View source for TRNA-dihydrouridine20a/20b synthase (NAD(P)+)

{{Infobox enzyme
| Name = 15-cis-phytoene desaturase
| EC_number = 1.3.5.5
| CAS_number = 
| IUBMB_EC_number = 1/3/5/5
| GO_code = 
| image = 
| width = 
| caption =
}}
'''15-Cis-phytoene desaturase''' ({{EC number|1.3.5.5}}, ''phytoene desaturase (ambiguous)'', ''PDS'', ''plant-type phytoene desaturase'') is an [[enzyme]] with system name ''15-cis-phytoene:plastoquinone oxidoreductase''.<ref>{{cite journal | title = Bleaching herbicide norflurazon inhibits phytoene desaturase by competition with the cofactors |author = Breitenbach, J., Zhu, C. and Sandmann, G. |journal = J. Agric. Food Chem. |year = 2001 |volume = 49 |pages = 5270–5272 |pmid = 11714315 |issue=11}}</ref><ref>{{cite journal | title = Phytoene desaturase: heterologous expression in an active state, purification, and biochemical properties |author = Schneider, C., Boger, P. and Sandmann, G. |journal = Protein Expr. Purif. |year = 1997 |volume = 10 |pages = 175–179 |pmid = 9226712 |doi=10.1006/prep.1997.0730 |issue=2}}</ref><ref>{{cite journal | title = Purification and reactivation of recombinant <em>Synechococcus</em> phytoene desaturase from an overexpressing strain of <em>Escherichia coli</em> |author = Fraser, P.D., Linden, H. and Sandmann, G. |journal = Biochem. J. |year = 1993 |volume = 291 |pages = 687–692 |pmid = 8489496 |pmc=1132422}}</ref><ref>{{cite journal | title = &zeta;-Carotene <em>cis</em> isomers as products and substrates in the plant <em>poly</em>-<em>cis</em> carotenoid biosynthetic pathway to lycopene |author = Breitenbach, J. and Sandmann, G. |journal = Planta |year = 2005 |volume = 220 |pages = 785–793 |pmid = 15503129 |doi=10.1007/s00425-004-1395-2}}</ref> This enzyme [[catalysis|catalyses]] the following [[chemical reaction]]

: 15-cis-phytoene + 2 [[plastoquinone]] <math>\rightleftharpoons</math> 9,15,9'-tricis-zeta-carotene + 2 [[plastoquinol]] (overall reaction)
: (1a) 15-cis-phytoene + plastoquinone <math>\rightleftharpoons</math> 15,9'-dicis-phytofluene + plastoquinol
: (1b) 15,9'-dicis-phytofluene + plastoquinone <math>\rightleftharpoons</math> 9,15,9'-tricis-zeta-carotene + plastoquinol

This enzyme is involved in [[carotenoid]] biosynthesis in [[plant]]s and [[cyanobacteria]].

== References ==
{{reflist}}

== External links ==
* {{MeshName|15-cis-phytoene+desaturase}}



{{Enzyme-stub}}

[[Category:EC 1.3.5]]